Communicating about Sex

Okay so I wanna know what kind of texts do you send to your SO throughout the day when your super horny and want to let him know you wanna get it on tonight?
Anything helps really, I'm just don't know what to say lol
How do you discuss sex with your SO? 
I've been married for almost two years and I don't know how to talk to him and ask him what he's wants and tell him what I want.